I actually do think they are planning on having a secondary ancillary entrance on the south side of "Liberty New Street", with stairs and elevators leading up to the 2nd floor "unpaid zone".
In the render (the orange circle you highlighted), you can see that there's space between the big concrete columns that go slightly inward into the building instead of just a flat wall, indicating an entrance of sorts. Although I guess some of the other renders do have more of a glass wall in place of the exposed columns... perhaps those are doors? It's a bit hard to say lol.
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